ImfB44Compressor.h

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
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#ifndef INCLUDED_IMF_B44_COMPRESSOR_H
#define INCLUDED_IMF_B44_COMPRESSOR_H

//-----------------------------------------------------------------------------
//
//	class B44Compressor -- lossy compression of 4x4 pixel blocks
//
//-----------------------------------------------------------------------------

#include <ImfCompressor.h>

namespace Imf {

class ChannelList;


class B44Compressor: public Compressor
{
  public:

    B44Compressor (const Header &hdr,
                   size_t maxScanLineSize,
           size_t numScanLines,
           bool optFlatFields);

    virtual ~B44Compressor ();

    virtual int		numScanLines () const;

    virtual Format	format () const;

    virtual int		compress (const char *inPtr,
                  int inSize,
                  int minY,
                  const char *&outPtr);

    virtual int		compressTile (const char *inPtr,
                      int inSize,
                      Imath::Box2i range,
                      const char *&outPtr);

    virtual int		uncompress (const char *inPtr,
                    int inSize,
                    int minY,
                    const char *&outPtr);

    virtual int		uncompressTile (const char *inPtr,
                    int inSize,
                    Imath::Box2i range,
                    const char *&outPtr);
  private:

    struct ChannelData;

    int			compress (const char *inPtr,
                  int inSize,
                  Imath::Box2i range,
                  const char *&outPtr);

    int			uncompress (const char *inPtr,
                    int inSize,
                    Imath::Box2i range,
                    const char *&outPtr);

    int			_maxScanLineSize;
    bool		_optFlatFields;
    Format		_format;
    int			_numScanLines;
    unsigned short *	_tmpBuffer;
    char *		_outBuffer;
    int			_numChans;
    const ChannelList &	_channels;
    ChannelData *	_channelData;
    int			_minX;
    int			_maxX;
    int			_maxY;
};


} // namespace Imf

#endif